Usage:
Saginaw Formation (MI*)
Saginaw Group (MI)
Subunits:
Hemlock Lake, Lake George and Winn Formation of Saginaw Group; Eaton Sandstone Member*, Ionia Sandstone Member, Parma Sandstone Member*, and Woodville Sandstone Member* of Saginaw Formation.
Geologic age:
Pennsylvanian, Early*
Pennsylvanian, Middle*
Type section, locality, area and/or origin of name:
Near Grand Ledge, Eaton Co., MI. Name derived from Saginaw Valley and Saginaw Co. (Lane, 1902).
AAPG geologic province:
Michigan basin*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).